CVE-2023-53789

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> iommu/amd: Improve page fault error reporting<br /> <br /> If IOMMU domain for device group is not setup properly then we may hit<br /> IOMMU page fault. Current page fault handler assumes that domain is<br /> always setup and it will hit NULL pointer derefence (see below sample log).<br /> <br /> Lets check whether domain is setup or not and log appropriate message.<br /> <br /> Sample log:<br /> ----------<br /> amdgpu 0000:00:01.0: amdgpu: SE 1, SH per SE 1, CU per SH 8, active_cu_number 6<br /> BUG: kernel NULL pointer dereference, address: 0000000000000058<br /> #PF: supervisor read access in kernel mode<br /> #PF: error_code(0x0000) - not-present page<br /> PGD 0 P4D 0<br /> Oops: 0000 [#1] PREEMPT SMP NOPTI<br /> CPU: 2 PID: 56 Comm: irq/24-AMD-Vi Not tainted 6.2.0-rc2+ #89<br /> Hardware name: xxx<br /> RIP: 0010:report_iommu_fault+0x11/0x90<br /> [...]<br /> Call Trace:<br /> <br /> amd_iommu_int_thread+0x60c/0x760<br /> ? __pfx_irq_thread_fn+0x10/0x10<br /> irq_thread_fn+0x1f/0x60<br /> irq_thread+0xea/0x1a0<br /> ? preempt_count_add+0x6a/0xa0<br /> ? __pfx_irq_thread_dtor+0x10/0x10<br /> ? __pfx_irq_thread+0x10/0x10<br /> kthread+0xe9/0x110<br /> ? __pfx_kthread+0x10/0x10<br /> ret_from_fork+0x2c/0x50<br /> <br /> <br /> [joro: Edit commit message]